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• Alias Artifacts

  26 avril 2013, par Multimedia Mike — General

  Throughout my own life, I have often observed that my own sense of nostalgia has a window that stretches about 10-15 years past from the current moment. Earlier this year, I discovered the show “Alias” and watched through the entire series thanks to Amazon Prime Instant Video (to be fair, I sort of skimmed the fifth and final season which I found to be horribly dull, or maybe franchise fatigue had set in). The show originally aired from 2001-2006 so I found that it fit well within the aforementioned nostalgia window.

  
  
  

  But what was it, exactly, about the show that triggered nostalgia ? The computers, of course ! The show revolved around spies and espionage and cutting-edge technology necessarily played a role. The production designer for the series must have decided that Unix/Linux == awesome hacking and so many screenshots featured Linux.

  Since this is still nominally a multimedia blog, I’ll start of the screenshot recon with an old multimedia player. Here is a vintage Mac OS desktop running an ancient web browser (probably Netscape) that’s playing a full-window video (probably QuickTime embedded directly into the browser).

  
  

  

  Click for larger image

  
  

  Let’s jump right into the Linux side of things. This screenshot makes me particularly sentimental since this is exactly what a stock Linux/KDE desktop looked like circa 2001-2003 and is more or less what I would have worked with on my home computer at the time :

  
  

  

  Click for larger image

  
  

  Studying that screenshot, we see that the user logs in as root, even to the desktop environment. Poor security practice ; I would expect better from a bunch of spooks.

  Echelon
  Look at the terminal output in the above screenshot– it’s building a program named Echelon, an omniscient spy tool inspired by a real-world surveillance network of the same name. In the show, Echelon is used to supply plot-convenient intelligence. At one point, some antagonists get their hands on the Echelon source code and seek to compile it. When they do, they will have access to the vast surveillance network. If you know anything about how computers work, don’t think about that too hard.

  Anyway, it’s interesting to note that Echelon is a properly autotool’d program– when the bad guys finally got Echelon, installation was just a ‘make install’ command away. The compilation was very user-friendly, though, as it would pop up a nice dialog box showing build progress :

  
  

  

  Click for larger image

  
  

  Examining the build lines in both that screenshot and the following lines, we can see that Echelon cares about files such as common/db_err.c and bt_curadj.c :

  
  

  

  Click for larger image

  
  

  A little googling reveals that these files both belong to the Berkeley DB library. That works ; I can imagine a program like this leveraging various database packages.

  Computer Languages
  The Echelon source code stuff comes from episode 2.11 : “A Higher Echelon”. While one faction had gotten a hold of the actual Echelon source code, a rival faction had abducted the show’s resident uber-nerd and, learning that they didn’t actually receive the Echelon code, force the nerd to re-write Echelon from scratch. Which he then proceeds to do…

  
  

  

  Click for larger image

  
  

  The code he’s examining there appears to be C code that has something to do with joystick programming (JS_X_0, JS_Y_1, etc.). An eagle-eyed IMDb user contributed the trivia that he is looking at the file /usr/include/Linux/joystick.h.

  Getting back to the plot, how could the bad buys possibly expect him to re-write a hugely complex piece of software from scratch ? You might think this is the height of absurdity for a computer-oriented story. You’ll be pleased to know that the writers agreed with that assessment since, when the program was actually executed, it claimed to be Echelon, but that broke into a game of Pong (or some simple game). Suddenly, it makes perfect sense why the guy was looking at the joystick header file.

  This is the first bit of computer-oriented fun that I captured when I was watching the series :

  
  

  

  Click for larger image

  
  

  This printout purports to be a “mainframe log summary”. After some plot-advancing text about a security issue, it proceeds to dump out some Java source code.

  SSH
  Secure Shell (SSH) frequently showed up. Here’s a screenshot in which a verbose ‘ssh -v’ connection has just been closed, while a telnet command has apparently just been launched (evidenced by “Escape character is ‘^]’.”) :

  
  

  

  Click for larger image

  
  

  This is followed by some good old Hollywood Hacking in which a free-form database command is entered through any available command line interface :

  
  

  

  Click for larger image

  
  

  I don’t remember the episode details, but I’m pretty sure the output made perfect sense to the character typing the command. Here’s another screenshot where the SSH client pops up an extra-large GUI dialog element to notify the user that it’s currently negotiating with the host :

  
  

  

  Click for larger image

  
  

  Now that I look at that screenshot a little more closely, it appears to be a Win95/98 program. I wonder if there was an SSH client that actually popped up that gaudy dialog.

  There’s a lot of gibberish in this screenshot and I wish I had written down some details about what it represented according to the episode’s plot :

  
  

  

  Click for larger image

  
  

  It almost sounds like they were trying to break into a network computer. Analyzing MD5 structure… public key synthesized. To me, the funniest feature is the 7-digit public key. I’m a bit rusty on the math of the RSA cryptosystem, but intuitively, it seems that the public and private keys need to be of roughly equal lengths. I.e., the private key in this scenario would also be 7 digits long.

  Gadgets
  Various devices and gadgets were seen at various junctures in the show. Here’s a tablet computer from back when tablet computers seemed like fantastical (albeit stylus-requiring) devices– the Fujitsu Stylistic 2300 :

  
  

  

  Click for larger image

  
  

  Here’s a videophone from an episode that aired in 2005. The specific model is the Packet8 DV326 (MSRP of US$500). As you can see from the screenshot, it can do 384 kbps both down and up.

  
  

  

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  I really regret not writing down the episode details surrounding this gadget. I just know that it was critical that the good guys get it and keep from falling into the hands of the bad guys.

  
  

  

  Click for larger image

  
  

  As you can see, the (presumably) deadly device contains a Samsung chip and a Lexar chip. I have to wonder what device the production crew salvaged this from (probably just an old cell phone).

  Other Programs

  The GIMP photo editor makes an appearance while scrubbing security camera footage, and serves as the magical Enhance Button (at least they slung around the term “gamma”) :

  
  

  

  Click for larger image

  
  

  I have no idea what MacOS-based audio editing program this is. Any ideas ?

  
  

  

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  FTP shows up in episode 2.12, “The Getaway”. It’s described as a “secure channel” for communication, which is quite humorous to anyone versed in internet technology.

  
  

  

  Click for larger image

  
  

• FFMPEG hwaccel convert WEBM to MP4 video failed : could not find codec parameters

  1er juillet 2020, par Yen Nguyen

  I use FFMPEG to convert webm videos into mp4 format using a Nvidia GPU GeoForce GTX 1660 card on Windows 10. It has worked perfectly since the beginning for few months but now it's stopped working with strange error as below :

  



  [h264 @ 0000013d8b5eee00] missing picture in access unit with size 431
[extract_extradata @ 0000013d8b6aef40] No start code is found.
big-buck-bunny-trailer.webm: could not find codec parameters


  



  FFMPEG version and Nvidia driver version are the same as before it just crashed overnight without a clue. I tried Googling around and did update to the latest ffmpeg version as well Nvidia driver version but it still doesn't help.
If I switch to CPU decoder (without hwaccel arg) using libx264 it just works fine.

  



  Environment Windows 10 64bit | ffmpeg version git-2020-04-15-51db0a4 (latest) | Nvidia GeForce GTX 1660, 
 - Geoforce Game Ready Driver version:445.87 Release Date Apr 15, 2020

  



   ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i big-buck-bunny-trailer.webm -c:v h264_nvenc output.mp4

ffmpeg version git-2020-04-15-51db0a4 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200328
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 42.102 / 56. 42.102
  libavcodec     58. 78.102 / 58. 78.102
  libavformat    58. 42.100 / 58. 42.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 77.101 /  7. 77.101
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[h264 @ 0000013d8b5eee00] missing picture in access unit with size 431
[extract_extradata @ 0000013d8b6aef40] No start code is found.
big-buck-bunny-trailer.webm: could not find codec parameters
WARNING: defaulting hwaccel_output_format to cuda for compatibility with old commandlines. This behaviour is DEPRECATED and will be removed in the future. Please explicitly set "-hwaccel_output_format cuda".
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, matroska,webm, from 'big-buck-bunny-trailer.webm':
  Metadata:
    encoder         : http://sourceforge.net/projects/yamka
    creation_time   : 2010-05-20T08:21:12.000000Z
  Duration: 00:00:32.48, bitrate: N/A
    Stream #0:0(eng): Video: h264, none, 640x360, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn (default)
    Stream #0:1(eng): Audio: vorbis, 44100 Hz, mono (default)
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))
Press [q] to stop, [?] for help
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 66
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1339
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1415
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1908
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2123
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2504
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2294
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2684
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2468
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2622
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2867
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2737
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 3017
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2556
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 7811
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1880
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1722
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2309
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1215
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2080
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1775
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2247
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1782
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1945
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1529
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1807
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2015
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1568
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2159
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1861
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2397
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1627
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2364
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1821
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2282
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2068
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1699
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2129
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2268
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2197
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1981
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2169
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2888
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1600
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2958
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1518
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2738
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2319
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2421
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2841
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1949
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2422
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2288
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2559
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2332
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2403
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2257
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2573
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2320
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2231
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2408
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2415
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2194
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2697
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2480
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2256
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2245
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2519
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2203
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2332
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2341
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2439
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2201
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2882
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2467
Too many packets buffered for output stream 0:1.
[aac @ 0000013d8b6bf5c0] Qavg: 115.929
[aac @ 0000013d8b6bf5c0] 2 frames left in the queue on closing
Conversion failed!


  



  Does anyone know how to fix it, i am getting stuck for few days ?
Much appreciated !

  


• FFMPEG hwaccel convert WEBM to MP4 video issue

  19 avril 2020, par Yen Nguyen

  I use FFMPEG to convert webm videos into mp4 format using a Nvidia GPU GeoForce GTX 1660 card on Windows 10. It has worked perfectly since the beginning for few months but now it's stopped working with strange error as below :

  



  [h264 @ 0000013d8b5eee00] missing picture in access unit with size 431
[extract_extradata @ 0000013d8b6aef40] No start code is found.
big-buck-bunny-trailer.webm: could not find codec parameters


  



  FFMPEG version and Nvidia driver version are the same as before it just crashed overnight without a clue. I tried Googling around and did update to the latest ffmpeg version as well Nvidia driver version but it still doesn't help.
If I switch to CPU decoder (without hwaccel arg) using libx264 it just works fine.

  



  Environment Windows 10 64bit | ffmpeg version git-2020-04-15-51db0a4 (latest) | Nvidia GeForce GTX 1660, 
 - Geoforce Game Ready Driver version:445.87 Release Date Apr 15, 2020

  



   ffmpeg -y -vsync 0 -hwaccel cuvid -c:v h264_cuvid -i big-buck-bunny-trailer.webm -c:v h264_nvenc output.mp4

ffmpeg version git-2020-04-15-51db0a4 Copyright (c) 2000-2020 the FFmpeg developers
  built with gcc 9.3.1 (GCC) 20200328
  configuration: --enable-gpl --enable-version3 --enable-sdl2 --enable-fontconfig --enable-gnutls --enable-iconv --enable-libass --enable-libdav1d --enable-libbluray --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-libopus --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libsrt --enable-libtheora --enable-libtwolame --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libzimg --enable-lzma --enable-zlib --enable-gmp --enable-libvidstab --enable-libvmaf --enable-libvorbis --enable-libvo-amrwbenc --enable-libmysofa --enable-libspeex --enable-libxvid --enable-libaom --disable-w32threads --enable-libmfx --enable-ffnvcodec --enable-cuda-llvm --enable-cuvid --enable-d3d11va --enable-nvenc --enable-nvdec --enable-dxva2 --enable-avisynth --enable-libopenmpt --enable-amf
  libavutil      56. 42.102 / 56. 42.102
  libavcodec     58. 78.102 / 58. 78.102
  libavformat    58. 42.100 / 58. 42.100
  libavdevice    58.  9.103 / 58.  9.103
  libavfilter     7. 77.101 /  7. 77.101
  libswscale      5.  6.101 /  5.  6.101
  libswresample   3.  6.100 /  3.  6.100
  libpostproc    55.  6.100 / 55.  6.100
[h264 @ 0000013d8b5eee00] missing picture in access unit with size 431
[extract_extradata @ 0000013d8b6aef40] No start code is found.
big-buck-bunny-trailer.webm: could not find codec parameters
WARNING: defaulting hwaccel_output_format to cuda for compatibility with old commandlines. This behaviour is DEPRECATED and will be removed in the future. Please explicitly set "-hwaccel_output_format cuda".
Guessed Channel Layout for Input Stream #0.1 : mono
Input #0, matroska,webm, from 'big-buck-bunny-trailer.webm':
  Metadata:
    encoder         : http://sourceforge.net/projects/yamka
    creation_time   : 2010-05-20T08:21:12.000000Z
  Duration: 00:00:32.48, bitrate: N/A
    Stream #0:0(eng): Video: h264, none, 640x360, SAR 1:1 DAR 16:9, 25 fps, 25 tbr, 1k tbn (default)
    Stream #0:1(eng): Audio: vorbis, 44100 Hz, mono (default)
Stream mapping:
  Stream #0:0 -> #0:0 (h264 (h264_cuvid) -> h264 (h264_nvenc))
  Stream #0:1 -> #0:1 (vorbis (native) -> aac (native))
Press [q] to stop, [?] for help
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 66
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1339
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1415
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1908
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2123
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2504
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2294
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2684
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2468
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2622
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2867
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2737
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 3017
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2556
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 7811
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1880
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1722
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2309
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1215
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2080
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1775
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2247
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1782
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1945
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1529
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1807
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2015
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1568
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2159
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1861
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2397
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1627
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2364
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1821
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2282
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2068
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1699
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2129
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2268
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2197
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1981
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2169
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2888
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1600
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2958
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1518
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2738
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2319
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2421
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2841
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 1949
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2422
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2288
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2559
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2332
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2403
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2257
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2573
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2320
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2231
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2408
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2415
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2194
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2697
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2480
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2256
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2245
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2519
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2203
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2332
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2341
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2439
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2201
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2882
[NULL @ 0000013d8b5eee00] missing picture in access unit with size 2467
Too many packets buffered for output stream 0:1.
[aac @ 0000013d8b6bf5c0] Qavg: 115.929
[aac @ 0000013d8b6bf5c0] 2 frames left in the queue on closing
Conversion failed!


  



  Does anyone know how to fix it, i am getting stuck for few days ?
Much appreciated !